Featuring the latest OptiCubelens technology, it's bright enough for daytime use and slim enough to disappear on your bike. The included SP-14-RA bracket fits modern aero seatposts, and Snap Systemcompatibility makes it easy to mount wherever you need it. Key Features Compact and lightweight design OptiCubelens technology for daytime visibility USB-C rechargeable Lithium-ion Polymer battery Six light modes including Daytime HyperFlash options Mode memory and Battery Auto Save function Snap Systemcompatible for multiple mounting options SP-14-RA bracket fits aero seatposts up to 130 mm circumferenceSpecifications:Light source: 1 LED (60 lumens) Battery type: Rechargeable Lithium-ion Polymer Recharge method: USB-C (cable not included) Light modes: High / Low / Flashing / Group Ride / Daytime HyperFlash 1 / Daytime HyperFlash 2 Mounting bracket: SP-14-RA (fits aero seatposts up to 130 mm) Additional features: Low battery indicator, Mode memory, Battery Auto Save Mounting system: